Drifting and Tunneling
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چکیده
The drill & blast method is still the most typical method for medium to hard rock conditions. It can be applied to a wide range of rock conditions. Some of its features include versatile equipment, fast start-up and relatively low capital cost tied to the equipment. On the other hand, the cyclic nature of the drill & blast method requires good work site organization. Blast vibrations and noise also restrict the use of drill & blast in urban areas. FIGURE 6.1.-1. Tunneling methods in different rock/soil conditions. 6. Tunneling
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